Signal coupler unit



FIG. 1 shows a left-side outline perspective view from above;

FIG. 2 shows a right-side outline perspective view from above;

FIG. 3 shows a left-side outline perspective view from below;

FIG. 4 shows a right-side outline perspective view from below;

FIG. 5 shows a left-side outline view;

FIG. 6 shows a top outline view;

FIG. 7 shows a bottom outline view;

FIG. 8 shows a front outline view; and,

FIG. 9 shows a back outline view. 

The ornamental design for a signal coupler unit, as shown and described. 